초록 ▼

An implantable antiarrhythmia device which detects and classifies arrhythmias of the human heart, and delivers appropriate therapy. The device employs a method of arrhythmia classification based on a set of prioritized rules, each of the rules defining a plurality of criteria based upon characterist

An implantable antiarrhythmia device which detects and classifies arrhythmias of the human heart, and delivers appropriate therapy. The device employs a method of arrhythmia classification based on a set of prioritized rules, each of the rules defining a plurality of criteria based upon characteristics of sensed depolarizations of heart tissue, each rule being met when the criteria associated with the rule are met. Some rules, when met, trigger delivery of antiarrhythmia therapy. Other rules, when met, inhibit delivery of antiarrhythmia therapy. The rules may be met simultaneously, and if so, the highest priority rule governs the behavior of the device.

대표청구항 ▼

1. A rule-based cardiac arrhythmia detection software system, comprising:a set of parameters defining a plurality of hierarchical cardiac event pattern code rules, each of said pattern code rules prescribing criteria corresponding to a specific type of cardiac rhythm; an instruction set for storing

1. A rule-based cardiac arrhythmia detection software system, comprising:a set of parameters defining a plurality of hierarchical cardiac event pattern code rules, each of said pattern code rules prescribing criteria corresponding to a specific type of cardiac rhythm; an instruction set for storing information regarding each occurrence of a cardiac event according to type; an instruction set that computes time-based features for each occurrence of the cardiac event; an instruction set that computes a pattern code for each occurrence of the cardiac event which is based at least in part on the computed time-based features; an instruction set that computes counts of adherence based on the computed pattern code; an instruction set that applies the pattern code rules to the computed counts of adherence to determine a positive or a negative compliance status with any of said pattern code rules; an instruction set that selects a highest priority rule that is determined to have a positive compliance status; and an instruction set that provides an output indication of the specific type of cardiac rhythm corresponding to the selected highest priority rule.